[LisaSue]

My Trailblazer sounds like a jet plane. When I start the motor it sounds that way. It goes away, then starts again while I am driving. When I come to a stop; it stops. When I accerate it starts again. Please help

 

[rickhowtoo]

My Trailblazer sounds like a jet plane. When I start the motor it sounds that way. It goes away, then starts again while I am driving. When I come to a stop; it stops. When I accerate it starts again. Please help

Hard to help you out without actually hearing the noise. Does it seem to be coming from the engine compartment? You say you hear it when you start the motor. Next time before starting, open the hood and listen closely (or have someone listen for you) and see if it clearly is in the engine are. It could be (long shot) something to do with the fuel pump in the rear of the car. Bottom line, you are under warranty so take it in.

 

[ZR2LIFE]

It shouldn't make that sound. Let the dealership take a look at it.

 

[LisaSue]

Hard to help you out without actually hearing the noise. Does it seem to be coming from the engine compartment? You say you hear it when you start the motor. Next time before starting, open the hood and listen closely (or have someone listen for you) and see if it clearly is in the engine are. It could be (long shot) something to do with the fuel pump in the rear of the car. Bottom line, you are under warranty so take it in.

I listened to it and it is definitely coming from underneath the hood. No check engine light has come on.

 

[rickhowtoo]

I listened to it and it is definitely coming from underneath the hood. No check engine light has come on.

Yep, time for a visit to a dealership. It is warranty so no problem. A guess on my part (never hearing the sound but from the symptoms you describe it could be as simple as a loose belt or pulley. But again, who cares, let them fix it. Let us know how you make out.

 

[NDTB]

It could be a ton of things. Belt, loose hose on turbo, vacuum leak. I would get it in to the dealership and let the warranty do its jobby job.